Porting functions to the modern Puppet 4.x API

[binford2k]

We noticed that your Puppet module includes Puppet 3.x function and created this
pull request to help you get started porting them to the new API.

The Puppet function API has a long history and many people in the ecosystem,
including you, took advantage of this API to extend Puppet to do some really
cool things. Unfortunately the original function API had many critical
limitations, and so Puppet introduced a new and improved API with Puppet 4.x.

Each modern Puppet 4.x function is just a little faster and just a little safer
to use, meaning that as we all port our functions over, compilation times across
the ecosystem will get more and more performant. Modern Puppet 4.x functions
have improved thread safety, memory management, and load time. Even more
importantly, they’re isolated to the environment they’re loaded from.

And as a developer, you'll see benefits like namespaced function signatures,
automatic data type checking, multiple dispatches allowing you to easily handle
different kinds of function invocations, and vastly improved code reuse.

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This pull request was autogenerated and the ported functions do not yet take
advantage of the data type checking or multiple dispatches. You will want to
finish the port by making those changes and adding any documentation updates.
See this tutorial for more information.

While you're at it, double check to see if there are any functions that couldn't
be automatically ported and update them yourself.

To be extra cautious about losing data, this pull request did NOT delete the
legacy function files, so when you're satisfied with the new functions, don't
forget to delete the legacy code!

If this repo is a fork, when you're all done, you might consider contributing
your work upstream.

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If you have any questions, feel free to ping me in this PR, or stop by the
Puppet Community Slack to chat. And thanks so much
for being part of our vibrant community of developers!